Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie o número total de anos para o chassi do maserati 250f e pontos inferiores a 0.
 ###Tabelas: CREATE TABLE australian_ratings (australian_ratings_id AUTO_INCREMENT PRIMARY KEY, Order INT, Episode VARCHAR, Original airdate VARCHAR, Timeslot VARCHAR, Viewers (100000s) VARCHAR, Nightly rank INT, Weekly rank INT) CREATE TABLE complete_formula_one_world_championship_results (complete_formula_one_world_championship_results_id AUTO_INCREMENT PRIMARY KEY, Year INT, Entrant VARCHAR, Chassis VARCHAR, Engine VARCHAR, Points INT) CREATE TABLE deficit_spending (deficit_spending_id AUTO_INCREMENT PRIMARY KEY, End of Fiscal Year INT, Gross Debt in $Billions undeflated Treas. INT, as % of GDP Low-High VARCHAR, Debt Held By Public ($Billions) INT, as % of GDP (Treas/MW, OMB or OMB/MW) INT, GDP $Billions OMB/BEA est.=MW.com VARCHAR) CREATE TABLE federal_representation (federal_representation_id AUTO_INCREMENT PRIMARY KEY, Federal State VARCHAR, Number of Members INT, % Of total Members VARCHAR, Population (on the census also called Censo 2010) VARCHAR, % Of the population (Censo 2010) VARCHAR, Representativeness (Inhabitants / Mr) VARCHAR, Representatives of national average VARCHAR, Deputies required ignoring the limits INT) CREATE TABLE player_selections (player_selections_id AUTO_INCREMENT PRIMARY KEY, Rnd. VARCHAR, Pick # INT, NFL team VARCHAR, Pos. VARCHAR, College VARCHAR, Conf. VARCHAR)  
SELECT COUNT Year FROM complete_formula_one_world_championship_results WHERE Chassis = maserati 250f AND Points < 0